How Much Training and Feedback are Needed in MIMO Broadcast Channels?[]
- M. Kobayashi, G. Caire, and N. Jindal, How Much Training and Feedback are Needed in MIMO Broadcast Channels?, IEEE International Symposium on Information Theory, July 2008
Remark 1: Feedback/training time with respect to the coherence time: If the coherence time is doubled, the feedback and the training time must be scaled to the square root of the coherence time.